cornell



4 SheetsrSheet 1.

(No Model.)

B. GORNELY. v CUTTING AND GRINDING DEVICE FOR SEWING OR'EMBROIDERINGMACHINES.

Patented Jan. 7, 1890.

N PETERS, Phcluiflhngraphur. Wnhinglon, n c.

4 Sheets-Sheet 2.

' (No Model.)

B. OORNELY.

CUTTING AND GRINDING DEVICE FOR SEWING OR EMBROIDERING MACHINES.

Patented Jan. 7, 1890.

(No Model.) 4 Sheets-Sheet 3. E. OORNELY. CUTTING AND GRINDING DEVICEFOR SEWING 0R BMBROIDERING MACHINES.

F IG vm Patented Jan. 7, 1890.

FIG-IX.

N. PETERS, Fhawulhngryhur. Wuhlnglon. D. C.

(No Model.) 4 Sheets-Sheet 4.

E. GORNELY. UUTTING AND GRINDING DEVICE FOR SEWING 0R EMBROIDERINGMACHINES.

No. 418.909. Patented Jan. 7, 1890.

em/w N. PETERS. Fhowum n hu, Wxhinglnm D. C

ihvrrnn STATES PATENT OFFIC IMILE CORNELY, OF PARIS, FRANCE.

CUTTING AND GRINDING DEVICE FOR SEWING OR EMBROIDERING MACHINES-SPECIFICATION forming part of Letters Patent No. 418,909, dated January7, 1890.

Application filed July 13, 1886. Serial No. 207,929. (No model.)

To all whom it may concern.-

Be it known that I, EMILE CORNELY, temporarily residing at WVashington,in the District of Columbia, a resident of the city of Paris, in theRepublic of France, have invented new and useful Improvements in theCutting Apparatus for Sewing or Embroidering Machines, which is fullyset forth in the following specification.

My invention relates to certain improvements to the machine for whichLetters Patent of the United States were granted to me as assignee ofLeon Bertrand on the 15th day of April, 1881, No. 297,057.

The said machine consists, substantially, in a sewing or embroideringmachine provided with an automatic cutting apparatus, which cuts eachstitch after it has been drawn up by the needle, whereby a velvet orpeluche seam is produced.

In my patent, No. 3-;t6,091, dated July 29, 1886, I have explained howthe cut-off loops are removed by a system of revolving brushes, whichstrike against the needle after the loops have been cut by the scissors,and which brushes throw the cut-off ends outward and away from the seamto prevent them from becoming sewed into the work by the consecutivestitches.

011 the drawings the several figures represent detached views of theimprovements, which will'be referred to in the following description.

FigureI is a partial elevation; Fig. I, a par tial elevation at rightangles to Fig. I; Figs. II and III, details of the brush and cutters;Figs. IV and V, a side and rear elevation, respectively, showing theair-blast mechanism; Figs. VI to XIII, detail views, and Fig. XIV,

a view partly in elevation and partly in yer tical section. V

In Figs. I and I, I have again represented the head of the machine,together with the cutting apparatus of Patent No; 297,057, and with thebrushes K and their transmission of motion, as well as the fliers X Yfor holding the thread, which are the subject-matter of my patentapplication of December 30, 1885.

Figs. II and III represent a new arrangement of the brushes K, which aresecured to the shaft L. Instead of employing a brushwheel, as describedand shown in the patent application of December 30, 1885, I employ a fewbrushes only, but which are timed with the main shaft of the machine insuch a manner that the first of the brushes will strike the needle justat the moment when the loop has been cut off by the scissors, and willthus carry it off at the right moment. Thusaconsiderable economy isobtained in the use of the brushes, which are liable to rapid wear. Bythese means the speed of the revolving brushes may also be reduced, andif they make one revolution only to each turn of the main shaft A theirshaft L need not be coupled to the feed-bar F, nor need it rise and fallwith the feed, as in this case the brushes will not come in contact withthe foot M when it rises, they being then in a direction opposed to it,as represented at Fig. II. Upon working with silk thread the cutoffloops are more or less torn by the brushes and their fibers are spreadlike a light down over the work, and thus much injure its appearance. Toprevent thisinconvenience I apply a blast of air to the machine, which,by means of tubes, is conducted close to the needle, to remove thefibers before they can settle on the material.

In Figs. IV and V Ihave represented, as an example, a pair of bellowsdriven by the small fly-wheel II of the machine. A crankarm 1 is securedto the face of the fly-wheel II, and a pitman U is connected to it andto the movable part of the bellows Z, whence the tubing V passes to theneedle of the machine, and the blast from the bellows created by itsmovement passes through the tube V to the needle to chase away any smallfibers or down resulting from the work.

The scissors p of the machine, as described and shown in Patent No.297,057, are represented at FigsVLVILVIII, and IX. To make thesescissors out well, their blades must be slightly inclined one toward theother, and they must be pressed together by means of a spring, whichinsures always a close contact of the two blades. 0 and m are the twoplates to which the scissors are secured and by which their motion isproduced. The circular boss 2 on the plate m is fitted into the sleeve 3of plate 0, and the pivot-stud h is passed through both and is securedto the block E by means of a screw b. The spring of the stud h thuspresses again st the plates on and and spreads them one from the other;but inasmuch as the lower blade 19 Fig. VI, is secured to the upperplate on and the upper blade 19 to the lower plate 0 the two blades willbe pressed together by the action of the spring of stud 72, and thus thetwo blades will act effectually and will always be in good cuttingcondition when properly sharpened.

In Figs. X, XI, and XII I have represented an apparatus for sharpeningthe blades. f

. represents an emery-wheel or grinding-stone which is secured to thesmall fly-wheel H of the machine. 9 represents a stud which is fittedinto the end of the shaft of wheel H, and on which is also closelyfitted a box 00, so that it can slide longitudinally on stud g. A frameq is fitted within proper ways upon the box cc, and it can be adjustedthereon, by means of the set-screw r, to shift it toward or from thestud g. The blade 19 to be ground is set upon the studs 11 and 12 of theinclined part of frame q, and is secured thereon by means of the clamp rand its screw u, and

' the angle of the incline is such that the edge of the blade 19, whenpresented to the emerywheel f, will have the proper bevel cut thereon toproduce a perfect cutting-edge, which will be always the same andperfectly true. Fig. XIII shows details of the blades 1).

The operation of the grinding mechanism will be readily understood fromthe foregoing description. The blade being placed in the clamping-frameq, the latter is adjusted by screw 22 to such position that the face ofthe blade bears against the grinding-wheel f, which is rotated withshaft A, the operator retaining hold of the head of screw 01, thusholding the frame (1 and the blade stationary. By sliding box 00 backand forth the operator can bring every part of the face of the blade tobear upon the periphery of the grindingwheel, and by turning screw 1;the pressure of the blade upon the wheel can be properly regulated.

In certain kinds of goods where great strength is required for thevelvet work a second thread may be employed in the production of theseam by winding said second thread around the under side of eachchainstiteh by means of a continuously-revolving thread-carrier whichworks below the clothplate of the machine. Such a rotatingthreadcarrier, together with the mechanism by which it is operated, isillustrated in Fig. XIV, which is a View partly in elevation and partlyin vertical section. It.- will only be necessary in connection with thisfigure to describe the operation of the devices for winding a secondthread around the sewing-thread beneath the cloth-plate. Directly belowthe needle is a hollow (zone 20, supported by a tube a, which is fixedto the casting Z. The cone 20 has a hole at the top for the passage ofthe needle. The cone 20 covers the oscillating looper n, which is of theusual construction. The wheel 21 is provided with a hub 22, and ismounted loosely on tube a. The hub 22 carries the thread-carrier G andits spool D. As the wheel 21 rotates, the thread from the end of thethread-carrier G is wound around the sewing-thread, there being onerevolution of the thread-carrier for each reciprocation of the needle.The wheel 21 receiyes its motion from the main shaft A of the machine bymeans of the gearing shown. Alongside of the main shaft is asupplemental shaft 23, having bearings in brackets 24 25. A gear 26 onshaft 23 engages a gear (not shown) on main shaft A. The Vertical shaft27 receives motion from shaft 23 through pinions 28 29, and transmitsits motion to shaft 30 through pinions 81 32. From shaft- 30 motion iscommunicated to the short shaft 35 through pinions 33 34, and the gear36 on the latter shaft engages with and rotates the wheel 21.

It is obvious that parts of the invention may be used without the whole,and that modifications may be made in the details of constructionwithout departing from the spirit of the invention.

I claim 1. The combination, with the stitch-forming mechanism, includinga vertically-movin g needle, a feed-ring, and means for impartingthereto a rising and falling as well as a horizontal motion, of cuttersfor severing the thread after the needle rises, a shaft and connectionsfor operating the same, and a brush carried by said shaft and sodisposed thereon as to strike the needle just as the thread is cut, thefeed-ring rising when the brush is turned out of the way, substantiallyas described.

2. In a sewing-machine employing cutters for severing the thread, thecombination, with a rotating shaft and grinding-wheel thereon, of asupport for the blade to rest upon, said support being mounted on anaxial extension of said shaft, and a clamp forholding said blade uponsaid support, the latter being inclined to present the blade to thegrinding-wheel at the proper angle, substantially as described.

3. In a sewing-machine employing cuttingblades, the combination, with arotating shaft and grinding-wheel thereon, of a box adjustablelongitudinally with re pect to said shaft, and a supporting-frame forholding the blade and presenting it to the grinding-wheel, said framebeing adjustable radially with respect to said shaft, substantially asdescribed.

' 4. The combination, with the stitch-form- ICC ing mechanism and thecutters for severing In testimony whereof I have signed this thesewing-thread after the formation of each specification in the presenceof two snbscrlbto stitch, of the rotating thread-carrier suping'witnesses.

ported below the c1oth-p1ate,and operating 1 r means, as specified,whereby a thread is EMILE CORNELL wound around the sewing-thread on theun- \Vitnesses:

der side of the work, substantially as de- EDWARD P. MAGLEAN,

scribed. JOSEPH B. BOURNE.

